The ovaries are small organs that produce egg cells in females. Removal of ovaries results in an inability to reproduce. In addition, if the ovaries are removed before a girl reaches puberty, she matures into an adult but without the secondary sex characteristics associated with females, including breast and hip development. Which of the following physiological responses best explains this observation?
A. The removal of ovaries signals to the brain that the female can no longer reproduce, and the brain responds by repressing genes for sexual development.
B. The ovaries are required to complete the neuronal circuitry necessary for the brain to stimulate sexual development in all areas of the body.
C. When the ovaries are removed, the body loses the production of hormones that travel through the blood to other parts of the body to induce sexual changes.
D. Genes that stimulate sexual development are present in the ovaries but not in other cells, and so ovary removal prevents normal development.